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WO2002008239A1 - Nouveaux disaccharides a action anti-arthrosique - Google Patents

Nouveaux disaccharides a action anti-arthrosique Download PDF

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Publication number
WO2002008239A1
WO2002008239A1 PCT/ES2001/000265 ES0100265W WO0208239A1 WO 2002008239 A1 WO2002008239 A1 WO 2002008239A1 ES 0100265 W ES0100265 W ES 0100265W WO 0208239 A1 WO0208239 A1 WO 0208239A1
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WO
WIPO (PCT)
Prior art keywords
group
formula
hydrogen
methyl
compound according
Prior art date
Application number
PCT/ES2001/000265
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English (en)
Spanish (es)
Inventor
Francisco Javier Vila Pahi
Francesc Flores Salgado
Ramon Ruhi Roura
Narcís ARNAU PASTOR
Original Assignee
Bioiberica, S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bioiberica, S.A. filed Critical Bioiberica, S.A.
Priority to US10/332,505 priority Critical patent/US6680304B2/en
Priority to AU2001269139A priority patent/AU2001269139A1/en
Priority to ES01947467T priority patent/ES2267788T3/es
Priority to EP01947467A priority patent/EP1300411B1/fr
Priority to CA002415752A priority patent/CA2415752C/fr
Priority to DE60122156T priority patent/DE60122156T2/de
Publication of WO2002008239A1 publication Critical patent/WO2002008239A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H7/00—Compounds containing non-saccharide radicals linked to saccharide radicals by a carbon-to-carbon bond
    • C07H7/02—Acyclic radicals
    • C07H7/033—Uronic acids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/02—Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H11/00—Compounds containing saccharide radicals esterified by inorganic acids; Metal salts thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H3/00—Compounds containing only hydrogen atoms and saccharide radicals having only carbon, hydrogen, and oxygen atoms
    • C07H3/06—Oligosaccharides, i.e. having three to five saccharide radicals attached to each other by glycosidic linkages

Definitions

  • the present invention relates to new disaccharides, their pharmaceutically acceptable salts and solvates, and the pharmaceutical compositions containing them. Similarly, the present invention relates to a process for the preparation of the new disaccharides, as well as to their therapeutic use.
  • Osteoarthritis is the most common rheumatic joint disease that affects most people from 65 years of age, and is characterized by a gradual degradation of cartilaginous tissue, together with the presence of inflammation and pain.
  • the term osteoarthritis describes a picture in which the destruction of hyaline cartilage of the joints occurs.
  • the therapy focuses on the relief of symptoms, since so far no agent has been found that offers a proven reduction in the progression of cartilage deterioration, although there is some clinical evidence for chondroitin sulfate and acid hyaluronic
  • Symptomatic substances include: those that act quickly such as analgesics, non-steroidal anti-inflammatory drugs (NSAIDs) and corticosteroids, and those that act somewhat more slowly known as SYSADOA (Symptomatic slow acting drug for osteoarthritis (Drugs with slow symptomatic action for the treatment of osteoarthritis)) (MG Lequesne, Rev. Rhum. (Eng./Ed.), 61, 69-73 (1994)), among which they find hyaluronic acid, chondroitin sulfate and ina glucose sulfate.
  • NSAIDs non-steroidal anti-inflammatory drugs
  • corticosteroids corticosteroids
  • Drugs with slow symptomatic action have additional safety advantages compared to NSAIDs (E. Maheu, European Journal of Rheumatology and Inflammation, 15, 17-24 (1995)), and longer action, even for some months after treatment suppression.
  • Hyaluronic acid is a non-sulfated glycosaminoglycan of natural origin, with a polymeric structure consisting of disaccharides of W-acetylglucosamine and glucuronic acid.
  • Hyaluronic acid is extracted from organs and / or tissues of mammalian animals.
  • a known problem is that, depending on the procedure for obtaining, the molecular weight of the product obtained may vary, which together with its origin may be different, causes several hyaluronic acids that may or may not have the same clinical effects.
  • the disaccharides of the present invention are structurally related to the dimers present in the polymer structure of hyaluronic acid, in that they are disaccharides with ⁇ - (1-3) bonds between glucuronic acid and glucosamine, but in the disaccharides of the present invention a sulfate group is always present in the C-4 and / or in the C-6 of the glucosamine ring.
  • J. R. Couchman et al. disclose esterified disaccharides, but differ from the compounds of the present invention in the nature of the alkyl radical of the ester group (-C00R '). Furthermore, said compounds also differ from those of the present invention in that they are useful for stimulating hair growth and for treating baldness.
  • the present invention provides new disaccharides of formula (I),
  • R is selected from the group consisting of: hydrogen, (C 1 -C 4 ) -linear or branched alkyl, phenylalkyl of less than ten carbon atoms and -COCH 3 ;
  • R is selected from the group consisting of: hydrogen, -COCH 3 and S0 3 M;
  • R 3 is selected from the group consisting of: hydrogen, (C 1 -C 4 ) -linear or branched alkyl, phenylalkyl of less than ten carbon atoms, -COCH 3 and -COPh, being Ph phenyl;
  • G is chosen from -COOR and -COOM, R being selected from the group consisting of: hydrogen, (C ⁇ -C 2 ) - alkyl and arylalkyl of less than sixteen carbon atoms;
  • A is selected from the group consisting of: hydrogen, -S0 3 H, -S0 3 M and -COCH 3 ;
  • B is selected from the group consisting of: hydrogen, -SO 3 H, -SO 3 M, and -COCH 3 , where necessarily or A or B is either -SO 3 H, or -SO 3 M, and M being an organic or metallic cation.
  • the compounds of formula (I) possess an anomeric carbon in their structure.
  • the present invention includes the ⁇ and ⁇ anomeric forms, as well as mixtures thereof.
  • the compounds of formula (I) are those where: G is -COOR 4 , or -COOM, where R (C ⁇ -C 2 ) -alkyl, or arylalkyl of less than sixteen carbon atoms, and M a metal cation
  • Particularly preferred embodiments of the present invention are those in which the compounds of formula (I) are any of the following: methyl 2-acetamido-2-deoxy-3-0- ( ⁇ -D-glucopyranosyl uronic) -6-O-sulfo- ⁇ -D-glucopyranoside, disodium salt; ethyl 2-acetamido-2-deoxy-3-0- ( ⁇ -D-glucopyranosyl uronic) -4-O-sulfo- ⁇ -D-glucopyranoside, disodium salt; methyl 2-acetamido-2-deoxy-3-0- ( ⁇ -D-glucopyranosyl uronic) -4,6-di-O-sulfo- -D-glucopyranoside, trisodium salt;
  • 2-acetamido-2-deoxy-3-0- ( ⁇ -D-glucopyranosyl uronic acid) - 6-O-sulfo-D-glucopyranoside, disodium salt
  • 2-acetamido-2-deoxy-3-0- ( ⁇ -D-glucopyranosyl uronic acid) - 4-O-sulfo-D-glucopyranoside, disodium salt
  • the compounds of general formula (I) are obtained from a process characterized in that a mono-saccharide of formula (II) is reacted,
  • R represents a reactive group that allows to establish a ⁇ - (l-3) bond with the free hydroxyl of the monosaccharide of formula (III)
  • R can be equivalent to the group R in (I) or be a protective group of carboxy groups that can be removed later, P1, P2 and P3 represent hydroxy protecting groups that can be subsequently removed, or else
  • R 7 may be equivalent to R1 in (I) or it may be a group that may or may not coincide with R, and post-
  • P 4 and P5 may be protective groups, together may constitute a cyclic protective group, or P 4 or P5 may be acetyl, in which case P 4 will be equivalent to B or P5 will be equivalent to A, to form an intermediate disaccharide of formula (IV):
  • reaction between (II) and (III) can be brought to for example, in an appropriate organic solvent, preferably dichloromethane, at a suitable temperature, preferably at room temperature, and in the presence of a catalyst such as silver triflate, a proton acceptor may also be present.
  • an appropriate organic solvent preferably dichloromethane
  • the condensation reaction between ⁇ -imidate (II) and alcohol (III) can be carried out in the presence of trimethylsilyl triflate, within an appropriate organic solvent , for example dichloromethane, and preferably at room temperature.
  • the groups P 1, P2 and P3 represent pivaloyl, benzoyl, acetyl or benzyl groups.
  • Groups P 4 and P5 preferably represent a cyclic protecting group such as benzylidene, which comes from the reaction of hydroxyls 4 and 6 of the glucosamine ring with benzaldehyde.
  • the group R preferably represents methyl.
  • the group R preferably represents methyl or benzyl.
  • the group R preferably represents acetyl, trichloroacetyl or benzyloxycarbonyl (BOC).
  • the intermediate disaccharide of formula (IV) is selectively protected.
  • the disaccharide of formula (IV) can be treated, for example, with ethanol-dichloromethane in the presence of p-toluenesulfonic acid , obtaining the intermediate disaccharide of formula (V),
  • P acetyl
  • the treatment is carried out, for example, with the sulfur-trimethylamine trioxide complex (S ⁇ 3 ⁇ e 3 ) in the sine of for example N, W-dimethylformamide, whereby it can obtain mostly the sulfated derivative in C- ⁇ , together with a smaller proportion of the disulfated derivative.
  • S ⁇ 3 ⁇ e 3 sulfur-trimethylamine trioxide complex
  • Scheme 3 shows the synthetic sequence to obtain some compounds of formula (I) in which R is hydrogen or benzyl.
  • the starting monosaccharide of formula (II) can be obtained starting from the commercial compound D- ⁇ ;> / .. sj ⁇ i
  • the starting monosaccharide of formula (III) can be obtained from the commercial compound D-glucosamine hydrochloride of formula (XII), by means of a series of selective hydroxyl protection reactions.
  • R benzyl
  • Another aspect of the present invention is its usefulness in human therapy, finding application in the prevention or treatment of osteoarthritis (osteoarthritis), and of inflammatory diseases such as inflammatory arthritis, rheumatoid arthritis, psoriatic arthritis, fever rheumatic, palynchromic rheumatism, Reiter's syndrome, lupus erythomatosus and ankylosing spondylitis.
  • the compounds of the present invention can also be used to control blood coagulation.
  • the present invention also relates to a method for preparing a medicament effective in the prevention or treatment of osteoarthritis, inflammatory diseases and blood coagulation, said method comprising the step of mixing a pharmaceutically acceptable vehicle and a therapeutically amount. effective of a compound of formula
  • compositions of the invention are formulated in suitable pharmaceutical compositions, using conventional techniques and excipients, such as those described in Remington's Pharmaceutical Science Handboock, Mack Pub. Co., NY, USA.
  • the new pharmaceutical compositions of the invention can be administered to the patient in suitable doses.
  • the administration of the compositions can be carried out by different routes, for example, oral, intravenous, intraperitoneal, intraarticular, subcutaneous, intramuscular, topical, intradermal or intranasal.
  • the pharmaceutical compositions of the invention include a therapeutically effective amount of a compound of the invention, said amount depending on many factors, such as, for example, the physical condition of the patient, age, sex, particular compound, route of administration and other factors. known in the art.
  • said active compound dosage can be administered in single or multiple dose units to provide the desired therapeutic effects.
  • other therapeutic agents may be employed in conjunction with those provided by the present invention.
  • the compounds of the invention are preferably administered to the patient by means of a pharmaceutically acceptable carrier.
  • a pharmaceutically acceptable carrier Such vehicles are well known in the art and will generally be in solid or liquid form.
  • Pharmaceutical preparations in solid form that can be prepared in accordance with the present invention include powders, mini-granules (pellets), tablets, dispersible granules, capsules, seals, suppositories and other solid galenic forms.
  • Liquid form preparations include solutions, suspensions, emulsions and microspheres.
  • preparations of solid forms that are to be converted, immediately before being used, into preparations in liquid form for oral, parenteral or intra-articular administration. Such liquid forms include solutions, suspensions and emulsions.
  • glycosaminoglycans such as hyaluronic acid
  • Example 1 Methyl 2-acetamido-2-deoxy-3-0- ( ⁇ -D-uronic glucopyranosyl) -6-O-sulfo- ⁇ -D-glucopyranoside, disodium salt (Ib) 1A Methyl 1,2,3,4-tetra-O-pivaloyl- ⁇ -D-glucopyranosyl uronate (Xa)
  • ID-Acetylglucosamine (Xllla) D-glucosamine hydrochloride (100 g, 0.46 mol) is added to a 0.6M solution of MeONa / MeOH and allowed to stir for 5 minutes. Acetic anhydride (48 ml) is then added and after 30 minutes a white precipitate appears, which is filtered and washed with cold ethanol. The mother liquors are recrystallized from absolute ethanol. 79.3 g of the title compound are obtained (quantitative).
  • reaction is neutralized by adding saturated NaHC ⁇ 3 solution, diluted with CH 2 CI 2 and the organic phase is washed with H 2 0 (3 x 100 ml). The organic extracts are dried over MgSO 4 and concentrated in vacuo.
  • the crude obtained is purified by silica gel column chromatography (toluene / acetone 5: 1), obtaining 7.8 g of methyl 2-acetamido-4,6-benzylidene-2-deoxy-3-0- (methyl 2 , 3, 4-tri-O-pivaloyl- ⁇ -D-glucopyranosyluronate) - ⁇ -D-glucopyranoside (80% yield) and 1.4 g (14%) of methyl 2-acetamido-4,6-benzylidene -2-deoxy- ⁇ -D-glucopyranoside recovered.
  • Methyl 2-acetamido-2-deoxy-3-0- (methyl 2,3,4-tri-O-pivaloyl- ⁇ -D-glucopyranosyluronate) -6-sulfo- ⁇ -D-glucopyranoside, sodium salt (Vllb)
  • a solution of methyl 2-acetamido-2-deoxy-3-0- (methyl 2, 3, 4-tri-O-pivaloyl- ⁇ -D-glucopyranosyluronate) - ⁇ -D-glucopyranoside (75 mg, 0.11 mmol ) in dry DMF (2 ml) is stirred for 2 days in the presence of the SO 3 -NMe 3 complex (200 mg, 1,437 mmol) at 55 ° C under an argon atmosphere.
  • the two resulting fractions are passed through DOWEX-50 W X4 (Na) (MeOH / H 2 ⁇ 9: 1) to give methyl 2-acetamido-2-deoxy-3-0- (methyl 2, 3, 4-tri- O-pivaloyl- ⁇ -D-glucopyranosyluronate) - 6-sulfo- ⁇ -D-glucopyranoside, sodium salt (62.4 mg, 68% off) and methyl 2-acetamido-2-deoxy-3-0- (methyl 2,3,4-tri-O-pivaloyl- ⁇ -D-glucopyranosyluronate) -4,6-disulfo- ⁇ -D-glucopyranoside, disodium salt (13 mg, 15% off).
  • Example 2 Methyl 2-acetamido-2-deoxy-3-Q- ( ⁇ -D-glucopyranosyl uronic) -4,6-di-O-sulfo- ⁇ -D-glucopyranoside, trisodium salt (le) To a solution of methyl 2-acetamido-2-deoxy-3-0- (methyl 2,3, 4-tri-O-pivaloyl- ⁇ -D-glucopyranosyluronate) -4, 6- disulfo- ⁇ -D-glucopyranoside, disodium salt (13 mg, 0.01 mmol) in 2 ml of a mixture (MeOH / H 2 ⁇ 5: 1) 1.5 ml of a 3M sodium hydroxide solution is added, left under stirring at room temperature for 2 days.
  • a mixture MeOH / H 2 ⁇ 5: 1

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  • Veterinary Medicine (AREA)
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  • Bioinformatics & Cheminformatics (AREA)
  • Diabetes (AREA)
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  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Peptides Or Proteins (AREA)

Abstract

La présente invention concerne de nouveaux disaccharides représentés par la formule générale (I), dans laquelle R1 représente un élément sélectionné dans le groupe comprenant un hydrogène, un alkyle (C¿1?-C4) linéaire ou ramifié, un phénylalkyle comprenant moins de dix atomes de carbone et un -COCH3; R?2¿ représente un élément sélectionné dans le groupe comprenant un hydrogène, un - COCH¿3? et un SO3M; R?3¿ représente un élément sélectionné dans le groupe comprenant un hydrogène, un alkyle (C¿1?-C4) linéaire ou ramifié, un phénylalkyle comprenant moins de dix atomes de carbone, un - COCH3 et un -COPh, Ph représentant un phényle; G représente un élément sélectionné dans le groupe comprenant un - COOR?4¿ et un -COOM, R4 étant sélectionné dans le groupe comprenant un hydrogène, un alkyle (C¿1?-C2) et un arylalkyle comprenant moins de seize atomes de carbone; A représente un élément sélectionné dans le groupe comprenant un hydrogène, un -SO3H, un -SO3M et un -COCH3; B représente un élément sélectionné dans le groupe comprenant un hydrogène, un -SO3H, un -SO3M et un -COCH3; A ou B représente nécessairement soit un -SO3H, soit un -SO3M, et M représentant un cation organique ou métallique. Ces composés peuvent être utilisés comme anti-arthrosiques, anti-inflammatoires ou pour réguler la coagulation sanguine.
PCT/ES2001/000265 2000-07-13 2001-07-05 Nouveaux disaccharides a action anti-arthrosique WO2002008239A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/332,505 US6680304B2 (en) 2000-07-13 2001-07-05 Disaccharides with anti-arthrosic properties
AU2001269139A AU2001269139A1 (en) 2000-07-13 2001-07-05 Novel disaccharides with anti-arthritic action
ES01947467T ES2267788T3 (es) 2000-07-13 2001-07-05 Nuevos disacaridos con accion antiartrosica.
EP01947467A EP1300411B1 (fr) 2000-07-13 2001-07-05 Nouveaux disaccharides a action anti-arthrosique
CA002415752A CA2415752C (fr) 2000-07-13 2001-07-05 Nouveaux disaccharides a action anti-arthritique
DE60122156T DE60122156T2 (de) 2000-07-13 2001-07-05 Neue disaccharide mit anti-arthritischer wirkung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200001741 2000-07-13
ES200001741A ES2167251B1 (es) 2000-07-13 2000-07-13 Nuevos disacaridos con accion antiartrosica.

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WO2002008239A1 true WO2002008239A1 (fr) 2002-01-31

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US (1) US6680304B2 (fr)
EP (1) EP1300411B1 (fr)
AT (1) ATE335752T1 (fr)
AU (1) AU2001269139A1 (fr)
CA (1) CA2415752C (fr)
DE (1) DE60122156T2 (fr)
DK (1) DK1300411T3 (fr)
ES (2) ES2167251B1 (fr)
PT (1) PT1300411E (fr)
WO (1) WO2002008239A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007525486A (ja) * 2003-11-24 2007-09-06 オプティマー・ファーマスーティカルズ・インコーポレイテッド 化合物の投与による哺乳動物の症状の処置及び化合物の使用方法
EP1761550A2 (fr) * 2004-05-26 2007-03-14 California Institute of Technology Petits stimulateurs de molecules de croissance neuronale
ES2327480B1 (es) 2007-06-15 2010-08-10 Bioiberica, S.A. "disacaridos para el tratamiento de tendones, ligamentos y huesos".
US8912149B1 (en) 2007-11-28 2014-12-16 California Institute Of Technology Glycosaminoglycan mimetics
ES2364683B1 (es) 2009-12-29 2012-08-08 Bioibérica S.A. Disacáridos sulfatados para el tratamiento de enfermedades neurodegenerativas y/o neurovasculares.
MX2013004575A (es) * 2010-10-29 2013-05-17 Opko Health Inc Disacaridos hipersulfatados para tratar trastornos relacionados con la elastasa.
US9770461B2 (en) 2013-08-02 2017-09-26 California Institute Of Technology Tailored glycopolymers as anticoagulant heparin mimetics
US10227370B2 (en) 2013-08-02 2019-03-12 California Institute Of Technology Heparan sulfate/heparin mimetics with anti-chemokine and anti-inflammatory activity
ES2684097B1 (es) 2017-03-29 2019-07-04 Bioiberica S A U Disacáridos sulfatados para el tratamiento del dolor neuropático

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211610A2 (fr) * 1985-08-01 1987-02-25 Unilever Plc Oligosaccharides utiles pour faire pousser les cheveux
WO1993009766A1 (fr) * 1991-11-15 1993-05-27 Arthro Research And Development Corporation Procede de traitement d'etats arthropathiques aigus et chroniques chez l'homme et d'autres mammiferes
EP0704216A1 (fr) * 1994-09-28 1996-04-03 Ibsa - Institut Biochimique S.A. Compositions pharmaceutiques sous forme de gel contenant des sels de chondroitin sulphate appropriés pour l'administration orale
WO2000047163A2 (fr) * 1999-02-11 2000-08-17 Institut National De La Sante Et De La Recherche Medicale (Inserm) Utilisation de l'acide hyaluronique ou des fragments de celle-ci pour la regulation de la differenciation hematopoietique
WO2000061592A1 (fr) * 1999-04-14 2000-10-19 Pierre Fabre Medicament Monosulfates de 4 ou 6 disaccharides

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0211610A2 (fr) * 1985-08-01 1987-02-25 Unilever Plc Oligosaccharides utiles pour faire pousser les cheveux
WO1993009766A1 (fr) * 1991-11-15 1993-05-27 Arthro Research And Development Corporation Procede de traitement d'etats arthropathiques aigus et chroniques chez l'homme et d'autres mammiferes
EP0704216A1 (fr) * 1994-09-28 1996-04-03 Ibsa - Institut Biochimique S.A. Compositions pharmaceutiques sous forme de gel contenant des sels de chondroitin sulphate appropriés pour l'administration orale
WO2000047163A2 (fr) * 1999-02-11 2000-08-17 Institut National De La Sante Et De La Recherche Medicale (Inserm) Utilisation de l'acide hyaluronique ou des fragments de celle-ci pour la regulation de la differenciation hematopoietique
WO2000061592A1 (fr) * 1999-04-14 2000-10-19 Pierre Fabre Medicament Monosulfates de 4 ou 6 disaccharides

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Title
GECIOVA R. ET AL.: "Physico-chemical properties of hyaluronan and its hydrophobic derivatives: a calorimetric and viscometric study(a)", MACROMOL. CHEM. PHYS., vol. 196, 1995, pages 2891 - 2903, XP002909683 *
JACQUINET J.C. ET AL.: "Multigram syntheses of the disaccharide repeating units of chondroitin 4- and 6-sulfates", CARBOHYDRATE RESEARCH, vol. 314, no. 3-4, 1998, pages 283 - 288, XP004166165 *
JACQUINET J.C.: "Syntheses of the methyl glycosides of the repeating units of chondroitin 4- and 6-sulfate", CARBOHYDRATE RESEARCH, vol. 199, no. 2, 1990, pages 153 - 181, XP002909681 *
TAKANASH ET AL.: "The synthesis of hyalobiuronic acid and chondrosine", J. AMER. CHEM. SOC., vol. 84, 1962, pages 3029, XP002909682 *

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Publication number Publication date
ES2167251A1 (es) 2002-05-01
ES2267788T3 (es) 2007-03-16
EP1300411B1 (fr) 2006-08-09
DE60122156D1 (de) 2006-09-21
DE60122156T2 (de) 2007-08-23
ES2167251B1 (es) 2003-09-16
PT1300411E (pt) 2006-12-29
US20030181400A1 (en) 2003-09-25
EP1300411A1 (fr) 2003-04-09
US6680304B2 (en) 2004-01-20
ATE335752T1 (de) 2006-09-15
CA2415752A1 (fr) 2003-01-10
CA2415752C (fr) 2009-09-15
AU2001269139A1 (en) 2002-02-05
DK1300411T3 (da) 2006-12-04

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